How to handle situation with being scheduled outside of availability (non union store)

My store is odd. This king Soopers is a non union store but they choose to follow several of the criterias that are laid out in union stores contracts. For example, the 20 hours per week requirement. That’s just one example. But the issue is that for Scheduling, this store has a “preferred availability” thing. This is a preferred availability document, so this is what we turn in when hired or adjusting schedule later down the road.

Has anyone dealt with scheduling conflicts with a preferred availability situation? The scheduling conflicts is that they want more hours from me because two of their favorites decided to lower their hours. So they decided to raise up mine by 15+. I can’t do that. I’m on my second year here.

You can skip this part: another odd thing is that we have had Asm’s come and go in like 4 month intervals. So weird.